CN113248195A - Heavy metal curing and repairing material in metal sulfide mine acidic mining side slope and construction method thereof - Google Patents
Heavy metal curing and repairing material in metal sulfide mine acidic mining side slope and construction method thereof Download PDFInfo
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- CN113248195A CN113248195A CN202110396456.4A CN202110396456A CN113248195A CN 113248195 A CN113248195 A CN 113248195A CN 202110396456 A CN202110396456 A CN 202110396456A CN 113248195 A CN113248195 A CN 113248195A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/32—Reclamation of surface-mined areas
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00758—Uses not provided for elsewhere in C04B2111/00 for agri-, sylvi- or piscicultural or cattle-breeding applications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00767—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes
- C04B2111/00775—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes the composition being used as waste barriers or the like, e.g. compositions used for waste disposal purposes only, but not containing the waste itself
Abstract
The application relates to the field of treatment of mine ecological environment, and particularly discloses a heavy metal solidification repair material in a metal sulfide mine acidic mining side slope and a construction method thereof, wherein the heavy metal solidification repair material in the metal sulfide mine acidic mining side slope comprises an isolation layer and a seed layer which are sequentially sprayed on the surface of the acidic side slope from inside to outside, and the isolation layer is composed of the following substances in parts by weight: 300-400 parts of water, 350-450 parts of planting soil, 100-150 parts of cement, 80-100 parts of calcium oxide and 20-60 parts of chelating agent. The construction method comprises the following steps: s1, preprocessing slope protection; s2, arranging an isolation layer; s3, setting a soil dressing layer; s4, setting a seed layer; the heavy metal solidification repair material in the metal sulfide mine acidic mining side slope can be used for mine ecological environment control, the efficiency of repairing the metal sulfide mine acidic mining side slope can be improved well, and the environment of the metal sulfide mine acidic mining side slope is improved.
Description
Technical Field
The application relates to the field of mine ecological environment treatment, in particular to a heavy metal curing and repairing material in a metal sulfide mine acidic mining side slope and a construction method thereof.
Background
Most of metal minerals exist in a sulfide form, heavy metal elements are widely distributed in the earth crust, and the metal minerals exist in various mineral rocks and form migration circulation in the natural environment through the processes of rock weathering, flow scouring and the like. The metal mineral products are not only the basis of industry, but also natural ecological environment pollution sources, the metal mineral products which are being exploited or are abandoned are artificial and natural dual pollution sources, and the pollution of heavy metal and acidic waste water is the maximum pollution of the ecological environment.
Most of the surrounding rocks of the sulfide metal ores are magma rocks and sedimentary rocks, more mines are mined in an open-pit mining mode, side slopes are mostly exposed, and low-grade ores or ore veins are directly exposed on the side slopes. Under the condition of exposed space, the sulfide metal ore is subjected to complex oxidation reaction under the combined action of air and rainwater; acid water is easily formed (the pH value can reach below 4), and the side slope rock layer or soil layer is acidified; the acid water formed after the slope acidification aggravates the leaching of heavy metals, thereby polluting the environment. The long-term oxidation leaching causes the change of the stress structure of the slope rock; causing geological disasters such as local collapse.
In the existing ecological restoration treatment process of the mining side slope of the vulcanized metal mine, a commonly used scheme is that the ecological restoration construction is simply carried out on an acid side slope by using a manual planting or foreign soil spray-seeding process, but acid water formed after sulfide oxidation erodes or seeps out of the side slope, so that vegetation is eroded by the acid water or the root environment of the vegetation is acidified, the vegetation is withered, and the phenomenon of 'yellow and three-year-dead light in two years in one year and two years' often appears.
Disclosure of Invention
In order to improve the defects of poor repairing effect and poor repairing efficiency in the ecological restoration treatment process of the existing sulfide metal mining side slope, the application provides a heavy metal curing repairing material in the metal sulfide mine acidic mining side slope and a construction method thereof, and the following technical scheme is adopted:
in a first aspect, the application provides a heavy metal solidification repair material in a metal sulfide mine acidic mining side slope, which comprises an isolation layer and a seed layer, wherein the isolation layer and the seed layer are sequentially coated on the surface of the acidic side slope from inside to outside, and the isolation layer is composed of the following substances in parts by weight: 300-400 parts of water, 350-450 parts of planting soil, 100-150 parts of cement, 80-100 parts of calcium oxide and 20-60 parts of chelating agent.
Through adopting above-mentioned technical scheme, because this application sets up isolation layer and seed layer on acid side slope surface, seal the surface of side slope and form through the isolation layer earlier and block the layer, block side slope surface sulphide and air and rainwater contact, make the side slope surface no longer by the oxidation, the production of control sour water. Meanwhile, the arrangement of the isolation layer can modify the acidic slope and solidify heavy metals; on the basis, vegetation cover is generated on the surface of the isolation layer through the seed layer, so that the slope environment is effectively restored, and a good restoration effect is achieved;
according to the method, firstly, metal ions in acid slope soil or rocks are chelated by a chelating agent material arranged in an isolation layer, so that the heavy metal ions are stabilized in the slope soil and effectively fixed, secondly, the heavy metal ions are dispersed in the isolation layer by calcium oxide arranged in the isolation layer, the pH value of the soil in the acid slope is improved, heavy metals in the acid slope are passivated, and the growing environment of vegetation is restored;
meanwhile, cement is added in the scheme of the application for separation, the strength of the side slope isolation layer is effectively improved, the adhesion degree of the isolation layer and the side slope is increased, the side slope isolation layer is prevented from being washed away and sliding down by rainwater, and then hydrothermal reaction is carried out under the combined action of the cement, calcium oxide and water to neutralize the acidity of the underlying side slope.
Further, a guest soil layer is arranged between the isolation layer and the seed layer and is composed of the following materials in parts by weight: 500-650 parts of composite soil, 200-300 parts of water, 20-25 parts of cement, 20-25 parts of calcium oxide and 10-20 parts of chelating agent.
Through adopting above-mentioned technical scheme, because this application sets up one deck guest soil layer again between isolation layer and seed layer, the setting on guest soil layer can improve the growing environment at the vegetation initial stage to a certain extent, through having optimized behind required nutrient of vegetation and the moisture, under follow-up growing environment, the setting on guest soil layer can accelerate the ecological prosthetic speed of side slope, provides its growing environment through the compound soil that sets up, the chelant that adds to in the soil can chelate metal ion in guest soil layer, makes it stabilize in guest layer, prevents the polluted environment. The added calcium oxide can be used for neutralizing an acid environment encountered during initial construction in the foreign soil layer, the pH value in the foreign soil layer is improved, the environment for the growth of vegetation in the initial stage is ensured, finally, the cement arranged in the foreign soil layer can improve the strength of the foreign soil layer on the one hand, the adhesion degree of the foreign soil layer and the isolation layer is increased, the slope foreign soil layer is prevented from being washed and falling off by rainwater, on the other hand, the cement can also perform hydrothermal reaction under the combined action of the calcium oxide and the water, the foreign soil layer is alkaline, the pH value of the foreign soil layer during the initial growth of vegetation is protected, and the repair degree and repair efficiency of plants to the slope are further improved.
Further, the isolation layer also comprises 2.0-3.0 parts by weight of water-absorbent resin.
Through adopting above-mentioned technical scheme, because this application has added water absorbent resin in the isolation layer and has modified, because water absorbent resin can form when moisture is sufficient and attach a large amount of moisture after the in-service use, when the isolation layer received the rainwash, the control rainwater did not dip the side slope, takes place from the source control side slope acidizing. Thereby further improving the phytoremediation efficiency.
Further, the thickness of the isolation layer is 12cm, the thickness of the soil dressing layer is 10cm, and the thickness of the seed layer is 3 cm.
Through adopting above-mentioned technical scheme, because this application technical scheme has optimized the thickness of isolation layer, guest soil layer and seed layer, through having carried out the adjustment with the thickness of isolation layer and guest soil layer, make it can not reduce the effect of keeping apart because of the thickness undersize, also can not lead to isolation layer and guest soil layer landing because of thickness is too high to effectively improve the seal effect of isolation layer and the phenomenon of the soil erosion and water loss on guest soil layer.
Furthermore, the porosity of the isolation layer is 45-55%.
Through adopting above-mentioned technical scheme, because this application has optimized the hole of isolation layer, make the root system after follow-up plant breeds the growth, can effectively prick root to the isolation layer inside, be favorable to the growth of later stage vegetation root system to effectively improve the phenomenon of the soil erosion and water loss of isolation layer.
Further, the passenger soil layer further comprises 120-200 parts by weight of compound fertilizer and 2.5-3.0 parts by weight of water-absorbent resin.
By adopting the technical scheme, because the composition of the soil layer of the passenger is optimized, the compound fertilizer and the water-absorbent resin are added into the soil layer of the passenger, the compound fertilizer can effectively provide nutrients for the growth of plants in the soil layer of the passenger, the water-absorbent resin can absorb a large amount of water, the humid environment and the nutrient content of the soil layer of the passenger are kept at the initial growth stage of vegetation on the soil layer of the passenger, and the initial growth of the vegetation is ensured.
Further, the composite soil comprises the following components in a mass ratio of 1: (4.5-11.5), and mixing peat soil and planting soil to prepare the fertilizer.
Through adopting above-mentioned technical scheme, because this application has optimized the composition of composite soil, through the peat soil and the organic cooperation of planting soil that add, wherein planting soil provides soil environment for the growth of initial vegetation, and peat soil can further improve the porosity of soil, for the root system growth in vegetation later stage provides the space, and both complement each other, have further improved the environment that is favorable to vegetation to grow in the composite soil.
Further, the compound fertilizer comprises a phosphate fertilizer and rice bran powder which are mixed according to the mass ratio of 1: 60-100.
By adopting the technical scheme, the composition of the compound fertilizer is optimized, and the rice bran powder and the phosphate fertilizer are compounded, wherein the rice bran powder and the phosphate fertilizer can provide organic matters and nutrients for the growth of vegetation root systems at the initial stage, and rice bran particles can be uniformly dispersed in a soil dressing layer and the pore uniformity performance of the rice bran particles is effectively improved.
Further, the isolation layer further comprises 0.15-0.20 parts by weight of potassium polyacrylate, and the guest soil layers further comprise 0.12-0.16 parts by weight of potassium polyacrylate.
Through adopting above-mentioned technical scheme, because this application all sets up polyacrylic acid potassium in passenger soil layer and isolation layer and modifies, the polyacrylic acid potassium that adds in isolation layer and the passenger soil layer can form the structure of granulating in the side slope basic unit, reduces the phenomenon of hardening that adds the side slope passenger soil layer of cement and makes the basic unit be difficult for appearing hardening, is favorable to subsequent vegetation to grow.
In a second aspect, the application provides a construction method of a heavy metal solidification repair material in a metal sulfide mine acidic mining side slope, wherein the construction steps of the heavy metal solidification repair in the metal sulfide mine acidic mining side slope comprise: s1, slope protection pretreatment: selecting a vulcanized metal mine exposed mining acid side slope, removing pumice on the side slope, paving a three-dimensional net on the slope along the slope from top to bottom, keeping smooth combination between the net and the slope, paving the pre-embedded three-dimensional net on the top of the slope, extending the three-dimensional net by 60cm, burying the three-dimensional net in soil, compacting the three-dimensional net, anchoring the three-dimensional net from bottom to top, and finishing side slope protection pretreatment; s2, setting the isolating layer: spreading the isolation layer material on the slope base layer, compacting the isolation layer material and adjusting the porosity of the isolation layer material to form an isolation layer on the surface of the slope; s3, setting a soil dressing layer: after the isolation layer is sprayed, standing for 7 days, spraying a soil dressing layer material on the outer surface of the isolation layer, spraying the thickness of the soil dressing layer, and standing for 3 days to form a soil dressing layer on the surface of the isolation layer; s4, setting a seed layer: and (3) spraying a seed layer on the surface of the foreign soil layer, allowing the seeds to bud, entering a maintenance stage, and maintaining vegetation for 2 years to finish heavy metal solidification and slope ecological restoration in the metal sulfide mine acidic mining slope.
By adopting the technical scheme, the side slope base layer is firstly treated, the surface flatness of the side slope base layer is improved, then the isolation layer is sprayed, so that the side slope surface is sealed, the blocking layer is formed, sulfide on the side slope surface is prevented from being contacted with air and rainwater and is not oxidized, meanwhile, the blocking base layer formed by the isolation layer can modify the acidic side slope base layer, so that heavy metal is solidified, meanwhile, the optimized base layer pores are favorable for the growth of the root system of vegetation in the later period, and then, the ecological vegetation is restored by spraying the blocking base layer and the seed layer; and ecological restoration of the side slope in slope mining is realized.
In summary, the present application includes at least one of the following beneficial technical effects:
firstly, an isolation layer and a seed layer are arranged on the surface of an acidic side slope, the surface of the side slope is sealed through the isolation layer to form a blocking layer, sulfides on the surface of the side slope are prevented from being in contact with air and rainwater, the surface of the side slope is prevented from being oxidized, the generation of acid water is controlled, and meanwhile, the acidic side slope can be modified through the isolation layer, and heavy metals are solidified; on this basis, this application generates vegetation cover on this isolation layer surface through the seed layer that sets up again, effectively restores the side slope environment, reaches good restoration effect.
And secondly, a layer of soil-covering layer is arranged between the isolation layer and the seed layer, the soil-covering layer can improve the growth environment of the vegetation in the initial stage to a certain extent, after nutrients and moisture required by plant growth are optimized, the rate of slope restoration can be increased by the soil-covering layer in the subsequent growth environment, the growth environment is provided by the set composite soil, and therefore the degree and the efficiency of the plant on slope restoration are further improved.
Third, this application has optimized the hole of isolation layer, makes the root system after follow-up plant breeds the growth, can effectively prick root to the isolation layer inside, is favorable to the growth of later stage vegetation root system to effectively improve the phenomenon of the soil erosion and water loss of isolation layer.
Fourth, this application is handled earlier the side slope basal layer, improve its surface smoothness, the one deck isolation layer is spouted in the rethread, make the side slope surface enclosed, the formation blocks the layer, block side slope surface sulphide and air and rainwater contact, no longer by the oxidation, the production of control acid water, the basic unit that blocks that the isolation layer formed simultaneously can modify the side slope basic unit of acidity, thereby the solidification heavy metal, basic unit's hole after optimizing simultaneously is favorable to the increase of later stage vegetation root system, through spouting podcast soil layer and seed layer on blocking the basic unit afterwards, realize the restoration of ecological vegetation, whole construction scheme is simple quick, can improve the efficiency of restoreing the acid side slope betterly, improve the environment of acid slope.
Detailed Description
The present application is described in further detail below with reference to preparation examples, examples and comparative examples.
Unless otherwise specified, the starting materials of the examples, comparative examples and comparative examples of the present application are commercially available;
cement: PO42.5R Portland cement;
chelating agent: a soil heavy metal chelating agent;
water-absorbent resin: starch graft acrylate polymer cross-linked polymer, acrylamide-acrylate copolymer cross-linked polymer.
Preparation example
Preparation of isolation layer Material
Preparation example 1
Taking 350kg with a volume of 0.35m3Placing the planting soil, 300kg of water, 100kg of cement, 80kg of calcium oxide, 20kg of chelating agent, 2.5kg of water-absorbent resin and 0.15kg of potassium polyacrylate in a stirring device, stirring and mixing, and collecting to obtain the isolation layer material 1.
Preparation example 2
Taking 400kg with the volume of 0.40m3Placing the planting soil, 350kg of water, 125kg of cement, 90kg of calcium oxide, 40kg of chelating agent, 2.7kg of water-absorbent resin and 0.18kg of potassium polyacrylate in a stirring device, stirring and mixing, and collecting to obtain the isolating layer material 2.
Preparation example 3
Taking 450kg of the mixture with the volume of 0.45m3Placing the planting soil, 400kg of water, 150kg of cement, 100kg of calcium oxide, 60kg of chelating agent, 3.0kg of water-absorbent resin and 0.20kg of potassium polyacrylate in a stirring device, stirring and mixing, and collecting to obtain the isolating layer material 3.
Preparation of material for soil dressing layer
Preparation example 4
Taking 450kg of the mixture with the volume of 0.45m3The planting soil has a volume of 0.10m of 100kg3Peat soil, 200kg of water, 20kg of cement, 20kg of calcium oxide, 10kg of chelating agent, 0.12kg of potassium polyacrylate, 2.0kg of phosphate fertilizer, 120kg of rice bran powder and 2.5kg of water-absorbent resin, stirring, mixing and collecting to obtain a soil dressing layer material 1.
Preparation example 5
500kg of the powder with the volume of 0.50m is taken3Planting soil, 62.5kg volume of 0.0625m3Peat soil, 250kg of water, 22kg of cement, 12kg of calcium oxide, 15kg of chelating agent, 0.14kg of potassium polyacrylate, 2.0kg of phosphate fertilizer, 160kg of rice bran powder and 2.7kg of water-absorbent resin, stirring, mixing and collecting to obtain a soil dressing layer material 2.
Preparation example 6
Taking 550kg with a volume of 0.55m3Planting soil, 50kg volume 0.05m3Peat soil, 300kg of water, 25kg of cement, 15kg of calcium oxide, 20kg of chelating agent, 0.16kg of potassium polyacrylate, 2.0kg of phosphate fertilizer, 200kg of rice bran powder and 3.0kg of water-absorbing resin, stirring, mixing and collecting to obtain a soil dressing layer material 3.
Examples
Example 1
S1, slope protection pretreatment: selecting a metal sulfide mine acid mining side slope, removing pumice on the side slope, paving a three-dimensional net on the slope along the slope from top to bottom, keeping smooth combination between the net and the slope, extending the side slope by 60cm from top to bottom, anchoring the three-dimensional net by adopting a U-shaped steel bar from top to bottom, and trimming the crack into a V shape along the side if the side slope has cracks, so that the cracks are well repaired, and the pretreatment of the slope protection of the side slope is completed;
s2, setting the isolating layer: spraying the isolation layer material onto the side slope by using an air compressor, and filling and smoothing the cracks by using the isolation layer material if the cracks exist on the side slope so as to form a 12cm isolation layer on the surface of the side slope; the porosity was adjusted to 45%.
S3, setting a soil dressing layer: after the isolation layer is sprayed, standing for 7 days, spraying a soil dressing layer material 1 on the outer surface of the isolation layer, spraying the soil dressing layer according to the spraying thickness of the soil dressing layer, standing for 3 days after the spraying is finished, and forming a soil dressing layer of 10cm on the surface of the isolation layer;
s4, setting a seed layer: and (3) spraying a seed layer with the thickness of 3cm on the surface of the foreign soil layer, allowing the seeds to enter a maintenance stage after budding, and performing vegetation maintenance for 2 years to finish heavy metal solidification and slope ecological restoration in the metal sulfide mine acidic mining slope.
Examples 2 to 9
Examples 2 to 9: the construction method of the heavy metal curing repair material in the metal sulfide mine acidic mining slope is different from that of the embodiment 1 in that the composition types of the isolation layer material and the soil dressing layer material are shown in the table 1, and the rest preparation steps and preparation environments are the same as those of the embodiment 1.
Table 1 table of the ingredient ratios of the raw materials of examples 1 to 9
Example 10: the construction method of the heavy metal curing repair material in the acid mining side slope of the metal sulfide mine is different from that of the embodiment 1 in that the porosity of the isolation layer in the embodiment 10 is 50%, and the metal sulfide mine is an iron mine.
Example 11: the construction method of the heavy metal curing repair material in the acid mining side slope of the metal sulfide mine is different from that of the embodiment 1 in that the porosity of the isolation layer in the embodiment 11 is 55 percent, and the metal sulfide mine is a polymetallic mine.
Comparative example
Comparative example 1: the construction method of the heavy metal curing repair material in the metal sulfide mine acid mining slope is different from that of the embodiment 1 in that no isolation layer is arranged in the comparative example 1, and the rest construction schemes and material compositions are the same as those of the embodiment 1.
Comparative example 2: the construction method of the heavy metal curing repair material in the metal sulfide mine acidic mining slope is different from that in the embodiment 1 in that calcium oxide is not added in the isolation layer material adopted in the comparative example 2, and the rest of construction schemes and material compositions are the same as those in the embodiment 1.
Comparative example 3: the construction method of the heavy metal curing repair material in the metal sulfide mine acidic mining slope is different from that in the embodiment 1 in that no chelating agent is added into the isolation layer material adopted in the comparative example 3, and the rest of the construction scheme and the material composition are the same as those in the embodiment 1.
Comparative example 4: the construction method of the heavy metal curing repair material in the metal sulfide mine acid mining slope is different from that in the embodiment 1 in that cement is not added to the isolation layer material adopted in the comparative example 4, and the rest of the construction scheme and the material composition are the same as those in the embodiment 1.
Comparative example 5: the construction method of the heavy metal curing repair material in the metal sulfide mine acidic mining slope is different from that in the embodiment 1 in that cement is not added into the soil dressing layer material adopted in the comparative example 5, and the rest of the construction scheme and the material composition are the same as those in the embodiment 1.
Comparative example 6: the construction method of the heavy metal curing repair material in the metal sulfide mine acidic mining slope is different from that in the embodiment 1 in that calcium oxide is not added in the soil dressing layer material adopted in the comparative example 6, and the rest of the construction scheme and the material composition are the same as those in the embodiment 1.
Comparative example 7: the construction method of the heavy metal curing repair material in the metal sulfide mine acidic mining slope is different from that in the embodiment 1 in that a chelating agent is not added to the soil dressing layer material adopted in the comparative example 7, and the rest of the construction scheme and the material composition are the same as those in the embodiment 1.
Comparative example 8: the construction method of the heavy metal curing repair material in the metal sulfide mine acid mining side slope is different from that of the embodiment 1 in that the thickness of the isolation layer of the comparative example 8 is 5cm, and the rest of the construction scheme and the material composition are the same as those of the embodiment 1.
Comparative example 9: the construction method of the heavy metal curing repair material in the metal sulfide mine acid mining side slope is different from that of the embodiment 1 in that the thickness of the isolation layer of the comparative example 9 is 15cm, and the rest of construction schemes and material compositions are the same as those of the embodiment 1.
Comparative example 10: the construction method of the heavy metal curing repair material in the metal sulfide mine acid mining side slope is different from that of the embodiment 1 in that the thickness of the foreign soil layer of the comparative example 10 is 5cm, and the rest construction scheme and the material composition are the same as those of the embodiment 1.
Comparative example 11: the construction method of the heavy metal curing repair material in the metal sulfide mine acid mining slope is different from that of the embodiment 1 in that the thickness of the soil dressing layer in the comparative example 11 is 15cm, and the rest construction schemes and material compositions are the same as those of the embodiment 1.
Comparative example 12: the construction method of the heavy metal curing repair material in the metal sulfide mine acidic mining side slope is different from that in the embodiment 1 in that a seed layer is not arranged in a comparative example 12, planting is directly carried out on the surface of a soil dressing layer, and the rest of construction schemes and material compositions are the same as those in the embodiment 1.
Comparative example 13: the construction method of the heavy metal curing repair material in the metal sulfide mine acid mining side slope is different from that of the embodiment 1 in that the porosity of the comparative example 13 is set to be 20%, and the rest of construction schemes and material compositions are the same as those of the embodiment 1.
Comparative example 14: the construction method of the heavy metal curing repair material in the metal sulfide mine acid mining side slope is different from the construction method in the embodiment 1 in that the porosity is set to be 60% in the comparative example 14, and the rest construction scheme and the material composition are the same as those in the embodiment 1.
Comparative examples
Comparative example 1: the construction method of the heavy metal curing repair material in the metal sulfide mine acid mining side slope is different from the construction method of the embodiment 1 in that a passenger soil layer is not arranged in the comparative embodiment 1, and the rest construction schemes and material compositions are the same as those in the embodiment 1.
Comparative example 2: the construction method of the heavy metal curing repair material in the metal sulfide mine acid mining slope is different from that of the embodiment 1 in that no water-absorbing resin is added into the isolation layer material in the comparative embodiment 2, and the rest of the construction scheme and the material composition are the same as those in the embodiment 1.
Comparative example 3: the construction method of the heavy metal curing repair material in the metal sulfide mine acid mining side slope is different from that of the embodiment 1 in that the composite fertilizer and the water-absorbent resin are not added in the material of the passenger soil layer in the comparative example 3, and the rest of the construction scheme and the material composition are the same as those in the embodiment 1.
Performance test
The performance tests were performed on the acid slopes repaired in examples 1 to 11, comparative examples 1 to 14, and comparative examples 1 to 3, respectively.
Detection method/test method
After the metal sulfide mine acid mining side slope is repaired for 2 years, the side slope environment and soil repair condition record is observed in a close distance, and the specific detection results are shown in the following table 2:
TABLE 2 Table for environmental remediation of side slopes
Performance analysis was performed from table 2 above:
(1) the composition ratios of the components in the embodiments 1-11 are combined with table 2, and it can be found that the metal sulfide mine acid mining slope after the construction is excellent in repair performance and basically completes the slope repair work, which indicates that the technical scheme of the application arranges the isolation layer and the seed layer on the surface of the acid slope, the surface of the slope is sealed by the isolation layer and forms the blocking layer, and the sulfide on the surface of the slope is blocked from contacting with air and rainwater, so that the surface of the slope is not oxidized any more, the generation of acid water is controlled, meanwhile, the arrangement of the isolation layer can modify the acid slope, heavy metals are solidified, and the repair degree and repair efficiency of plants on the slope are further improved.
(2) Comparing the performances of comparative examples 1-4 with that of example 1, wherein comparative examples 2-4 change the composition of the material of the isolation layer because no isolation layer is added to comparative example 1, and as shown in table 2, the environmental remediation performance of the side slope is remarkably reduced, particularly the environmental remediation performance of the side slope after the chelating agent and the calcium oxide are not added is remarkably reduced, which shows that the isolation layer and the seed layer are arranged on the surface of the acidic side slope in the technical scheme of the application, the surface of the side slope is sealed by the isolation layer and a blocking layer is formed, sulfides on the surface of the side slope are blocked from contacting with air and rainwater, so that the surface of the side slope is not oxidized any more, the generation of acidic water is controlled, and meanwhile, the acidic side slope can be modified by the arrangement of the isolation layer, and heavy metals are solidified; on this basis, this application generates vegetation cover on this isolation layer surface through the seed layer that sets up again, effectively restores the side slope environment, reaches good restoration effect.
(3) Comparing with the comparative examples 5-7 and the example 1, the compositions of the soil dressing layer materials are respectively adjusted in the comparative examples 5-7, and as shown in the table 2, the slope environment restoration effect is not good, and particularly the environment restoration performance is obviously reduced after the chelating agent and the calcium oxide are not added, which shows that the composition of the soil dressing layer materials is optimized by the technical scheme, the acidic slope can be modified, and heavy metals are solidified; on this basis, this application generates vegetation cover on this isolation layer surface through the seed layer that sets up again, effectively restores the side slope environment, reaches good restoration effect.
(4) Combine comparative example 8 ~ 12 and embodiment 1 to compare, the isolation layer has been adjusted respectively to comparative example 8 ~ 12, the thickness on guest soil layer and the existence of seed layer, by table 2 see, its side slope environment repair effect is also not good, but still have certain repair effect, this demonstrates that this application technical scheme has optimized the isolation layer, the thickness of guest soil layer and seed layer, through adjusting the thickness on isolation layer and guest soil layer, make it can not because of the thickness undersize, reduce the effect of keeping apart, can not lead to isolation layer and guest soil layer to fall off because of thickness is too high yet, the thickness of seed layer has been optimized in this application simultaneously, make it both can effectively sprout and prick root in the guest soil layer, thereby effectively improve the phenomenon of the soil erosion and water loss on guest soil layer.
(5) Combine comparative example 13 ~ 14 and embodiment 1 to compare, the porosity of isolation layer has been adjusted to comparative example 13 ~ 14, can see out by table 2, its side slope environment repair effect is also not good, this demonstrates that the hole of isolation layer has been optimized to this application technical scheme, make the root system after follow-up plant breeds the growth, can effectively prick root to the isolation layer inside, be favorable to the growth of later stage vegetation root system, prick root to the inside plant roots of isolation layer simultaneously, can effectively prevent its soil erosion phenomenon, thereby effectively improve the soil erosion phenomenon of the soil erosion of isolation layer.
(6) Comparing the comparative example 1 with the example 1, the comparative example 1 is not provided with a guest soil layer, and the data of the comparative example 1 are combined, so that the technical scheme of the application can further explain that the technical scheme of the application can improve the growing environment at the initial stage of vegetation by further arranging a guest soil layer between the isolation layer and the seed layer to a certain extent, and further improve the restoration degree and the restoration efficiency of the plant to the side slope in the subsequent growing environment after optimizing the nutrients and moisture required by the plant growth.
(7) Comparing comparative example 2 ~ 3 with embodiment 1, adjusted the composition of isolation layer material and soil dressing layer material in comparative example 2 ~ 3, combine comparative example 1 data, can further explain this application technical scheme has added water-absorbing resin in isolation layer and soil dressing layer and has modified, can form when moisture is sufficient and attach a large amount of moisture, under the effect of soil content not enough and vegetation demand, as the source of vegetation root system moisture to further improve the restoration degree and the restoration efficiency of plant to the side slope.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The heavy metal curing repair material in the metal sulfide mine acid mining side slope is characterized by comprising an isolation layer and a seed layer which are sequentially coated on the surface of the acid side slope from inside to outside, wherein the isolation layer is composed of the following substances in parts by weight:
300-400 parts of water;
350-450 parts of planting soil;
100-150 parts of cement;
80-100 parts of calcium oxide;
20-60 parts of a chelating agent.
2. The material for solidifying and repairing the heavy metal in the acid mining side slope of the metal sulfide mine as claimed in claim 1, wherein a guest soil layer is further arranged between the isolation layer and the seed layer, and the guest soil layer is composed of the following substances in parts by weight:
500-650 parts of composite soil;
200-300 parts of water;
20-25 parts of cement;
20-25 parts of calcium oxide;
10-20 parts of a chelating agent.
3. The material for solidifying and repairing the heavy metal in the metal sulfide mine acid mining slope according to claim 1, wherein the isolation layer further comprises 2.5-3.0 parts by weight of water-absorbent resin.
4. The material for solidifying and repairing the heavy metal in the metal sulfide mine acid mining side slope according to claim 2, wherein the thickness of the isolation layer is 12cm, the thickness of the alien soil layer is 10cm, and the thickness of the seed layer is 3 cm.
5. The material for solidifying and repairing the heavy metal in the metal sulfide mine acid mining side slope according to claim 1, wherein the porosity of the isolation layer is 45-55%.
6. The material for solidifying and repairing the heavy metal in the acid mining side slope of the metal sulfide mine as claimed in claim 2, wherein the passenger soil layer further comprises 120-200 parts by weight of compound fertilizer and 2.5-3.0 parts by weight of water-absorbent resin.
7. The metal sulfide mine acid mining slope heavy metal curing repair material as claimed in claim 2, wherein the composite soil comprises, by mass, 1: (4.5-11.5), and mixing peat soil and planting soil to prepare the fertilizer.
8. The material for solidifying and repairing the heavy metal in the metal sulfide mine acidic mining side slope according to claim 6, wherein the compound fertilizer comprises phosphate fertilizer and rice bran powder which are mixed according to the mass ratio of 1: 60-100.
9. The material for solidifying and repairing the heavy metal in the acid mining side slope of the metal sulfide mine as claimed in claim 2, wherein the isolation layer further comprises 0.15-0.20 parts by weight of potassium polyacrylate, and the passenger soil layers further comprise 0.12-0.16 parts by weight of potassium polyacrylate.
10. A construction method for curing and repairing heavy metals in a metal sulfide mine acid mining side slope is characterized in that the construction steps for curing and repairing the heavy metals in the metal sulfide mine acid mining side slope comprise:
s1, slope protection pretreatment: selecting a metal sulfide mine acid mining side slope, removing pumice on the side slope, paving a three-dimensional net on the slope surface from top to bottom along the slope surface, keeping smooth combination between the net and the slope surface, extending the side slope up and down by 60cm, anchoring the three-dimensional net by adopting U-shaped steel bars from top to bottom, and finishing the pretreatment of the side slope protection;
s2, setting the isolating layer: spreading the isolation layer material on the slope base layer, compacting the isolation layer material and adjusting the porosity of the isolation layer material to form an isolation layer on the surface of the slope;
s3, setting a soil dressing layer: after the isolation layer is sprayed, standing for 7 days, spraying a soil dressing layer material on the outer surface of the isolation layer, spraying the thickness of the soil dressing layer, and standing for 3 days to form a soil dressing layer on the surface of the isolation layer;
s4, setting a seed layer: and (3) spraying a seed layer on the surface of the foreign soil layer, allowing the seeds to bud, entering a maintenance stage, and maintaining vegetation for 2 years to finish heavy metal solidification and slope ecological restoration in the metal sulfide mine acidic mining slope.
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Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4106780A1 (en) * | 1991-03-04 | 1992-09-10 | Rheinische Braunkohlenw Ag | Reducing acidic water formation esp. in coal tip - by locating iron di:sulphide-rich spoil below other waste |
| US6004069A (en) * | 1997-05-29 | 1999-12-21 | Falconbridge Limited | Method for capping mine waste and tailing deposits |
| CN1508079A (en) * | 2002-12-13 | 2004-06-30 | 刘江浩 | Method for preventing mine from generating acid waste water |
| US20060229485A1 (en) * | 2005-04-12 | 2006-10-12 | Forrester Keith E | Method for dry seed stabilization of material or waste |
| CN103548519A (en) * | 2013-10-24 | 2014-02-05 | 华南农业大学 | Vegetation restoration structure of discarded metal mine and vegetation restoration method of discarded metal mine |
| CN103806454A (en) * | 2014-02-14 | 2014-05-21 | 北京矿冶研究总院 | Method for pollution control and vegetation recovery of metal sulfide ore solid waste storage yard |
| CN104312591A (en) * | 2014-10-13 | 2015-01-28 | 贵州美瑞特环保科技有限公司 | Stabilized curing agent for heavy metal contaminated soil or solid waste treatment and treatment method |
| CN106988320A (en) * | 2017-04-26 | 2017-07-28 | 李德群 | Limestone zone discards pit and is transformed into reservoir, the pool, the reclamation method in pond |
| CN107363083A (en) * | 2017-07-18 | 2017-11-21 | 北京科技大学 | A kind of five layers cover strong reducing in-situ into ore deposit restorative procedure |
| CN107552559A (en) * | 2017-10-13 | 2018-01-09 | 中节能工程技术研究院有限公司 | The restoration of the ecosystem structure and method on a kind of discarded ground of Acid mine |
| CN109042103A (en) * | 2018-08-02 | 2018-12-21 | 广东百林园林股份有限公司 | A kind of gardens Slope greening method |
| CN208402736U (en) * | 2018-05-29 | 2019-01-22 | 深圳文科园林股份有限公司 | A kind of separation layer of Mine Tailings library acid soil revegetation |
| CN109290364A (en) * | 2018-08-01 | 2019-02-01 | 江苏绿岩生态技术股份有限公司 | A kind of heavy metal pollution of mine soil remediation method |
| CN110105958A (en) * | 2019-06-14 | 2019-08-09 | 许昌学院 | A kind of the mine soil reparation reagent and its application method of heavy metal lead pollution |
| CN210184018U (en) * | 2019-04-10 | 2020-03-27 | 中国瑞林工程技术股份有限公司 | Strong acid heavy metal mine stope rock slope ecological restoration plant growth bag structure |
| CN111593745A (en) * | 2020-04-20 | 2020-08-28 | 北京矿冶科技集团有限公司 | Improved matrix for ecological restoration of metal mine acidic waste rock yard and ecological restoration method thereof |
| CN111875450A (en) * | 2020-08-17 | 2020-11-03 | 鄂尔多斯市蒙康元生物科技研究有限公司 | Soil repairing agent and repairing method for backfill area of coal mining pit |
-
2021
- 2021-04-13 CN CN202110396456.4A patent/CN113248195B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4106780A1 (en) * | 1991-03-04 | 1992-09-10 | Rheinische Braunkohlenw Ag | Reducing acidic water formation esp. in coal tip - by locating iron di:sulphide-rich spoil below other waste |
| US6004069A (en) * | 1997-05-29 | 1999-12-21 | Falconbridge Limited | Method for capping mine waste and tailing deposits |
| CN1508079A (en) * | 2002-12-13 | 2004-06-30 | 刘江浩 | Method for preventing mine from generating acid waste water |
| US20060229485A1 (en) * | 2005-04-12 | 2006-10-12 | Forrester Keith E | Method for dry seed stabilization of material or waste |
| CN103548519A (en) * | 2013-10-24 | 2014-02-05 | 华南农业大学 | Vegetation restoration structure of discarded metal mine and vegetation restoration method of discarded metal mine |
| CN103806454A (en) * | 2014-02-14 | 2014-05-21 | 北京矿冶研究总院 | Method for pollution control and vegetation recovery of metal sulfide ore solid waste storage yard |
| CN104312591A (en) * | 2014-10-13 | 2015-01-28 | 贵州美瑞特环保科技有限公司 | Stabilized curing agent for heavy metal contaminated soil or solid waste treatment and treatment method |
| CN106988320A (en) * | 2017-04-26 | 2017-07-28 | 李德群 | Limestone zone discards pit and is transformed into reservoir, the pool, the reclamation method in pond |
| CN107363083A (en) * | 2017-07-18 | 2017-11-21 | 北京科技大学 | A kind of five layers cover strong reducing in-situ into ore deposit restorative procedure |
| CN107552559A (en) * | 2017-10-13 | 2018-01-09 | 中节能工程技术研究院有限公司 | The restoration of the ecosystem structure and method on a kind of discarded ground of Acid mine |
| CN208402736U (en) * | 2018-05-29 | 2019-01-22 | 深圳文科园林股份有限公司 | A kind of separation layer of Mine Tailings library acid soil revegetation |
| CN109290364A (en) * | 2018-08-01 | 2019-02-01 | 江苏绿岩生态技术股份有限公司 | A kind of heavy metal pollution of mine soil remediation method |
| CN109042103A (en) * | 2018-08-02 | 2018-12-21 | 广东百林园林股份有限公司 | A kind of gardens Slope greening method |
| CN210184018U (en) * | 2019-04-10 | 2020-03-27 | 中国瑞林工程技术股份有限公司 | Strong acid heavy metal mine stope rock slope ecological restoration plant growth bag structure |
| CN110105958A (en) * | 2019-06-14 | 2019-08-09 | 许昌学院 | A kind of the mine soil reparation reagent and its application method of heavy metal lead pollution |
| CN111593745A (en) * | 2020-04-20 | 2020-08-28 | 北京矿冶科技集团有限公司 | Improved matrix for ecological restoration of metal mine acidic waste rock yard and ecological restoration method thereof |
| CN111875450A (en) * | 2020-08-17 | 2020-11-03 | 鄂尔多斯市蒙康元生物科技研究有限公司 | Soil repairing agent and repairing method for backfill area of coal mining pit |
Non-Patent Citations (4)
| Title |
|---|
| OUELLET, J，ET AL.: "Stabilization/solidification of pyritic mill tailings by induced", 《 9TH INTERNATIONAL CONFERENCE ON TAILINGS AND MINE WASTE》 * |
| 刘玉华: "金属硫化物矿山酸性开采边坡原位固化及厚层基材喷射技术研究", 《中国矿业》 * |
| 杨华明等: "冶金矿山生态修复技术的进展", 《鞍钢技术》 * |
| 王运敏: "《现代采矿手册 下》", 30 June 2012, 冶金工业出版社 * |
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